Hi Daniel, [auto build test WARNING on asoc/for-next] [also build test WARNING on next-20170405] [cannot apply to v4.11-rc5] [if your patch is applied to the wrong git tree, please drop us a note to help improve the system]
url: https://github.com/0day-ci/linux/commits/Daniel-Baluta/ASoC-codec-wm8960-Relax-bit-clock-computation-when-using-PLL/20170405-144647 base: https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound.git for-next config: i386-randconfig-s0-201714 (attached as .config) compiler: gcc-6 (Debian 6.2.0-3) 6.2.0 20160901 reproduce: # save the attached .config to linux build tree make ARCH=i386 Note: it may well be a FALSE warning. FWIW you are at least aware of it now. http://gcc.gnu.org/wiki/Better_Uninitialized_Warnings All warnings (new ones prefixed by >>): sound/soc/codecs/wm8960.c: In function 'wm8960_configure_clocking': >> sound/soc/codecs/wm8960.c:743:3: warning: 'best_freq_out' may be used >> uninitialized in this function [-Wmaybe-uninitialized] wm8960_set_pll(codec, freq_in, best_freq_out); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ sound/soc/codecs/wm8960.c:703:21: note: 'best_freq_out' was declared here int diff, closest, best_freq_out; ^~~~~~~~~~~~~ sound/soc/codecs/wm8960.c:806:56: warning: 'j' may be used uninitialized in this function [-Wmaybe-uninitialized] snd_soc_update_bits(codec, WM8960_CLOCK1, 0x7 << 6, j << 6); ~~^~~~ sound/soc/codecs/wm8960.c:802:54: warning: 'i' may be used uninitialized in this function [-Wmaybe-uninitialized] snd_soc_update_bits(codec, WM8960_CLOCK1, 3 << 1, i << 1); ~~^~~~ vim +/best_freq_out +743 sound/soc/codecs/wm8960.c 6b662dee Daniel Baluta 2017-04-04 727 *bclk_idx = k; 6b662dee Daniel Baluta 2017-04-04 728 best_freq_out = freq_out; 6b662dee Daniel Baluta 2017-04-04 729 break; 6b662dee Daniel Baluta 2017-04-04 730 } 16c42f46 Daniel Baluta 2017-04-04 731 if (diff > 0 && closest > diff) { 16c42f46 Daniel Baluta 2017-04-04 732 *sysclk_idx = i; 16c42f46 Daniel Baluta 2017-04-04 733 *dac_idx = j; 16c42f46 Daniel Baluta 2017-04-04 734 *bclk_idx = k; 16c42f46 Daniel Baluta 2017-04-04 735 closest = diff; 16c42f46 Daniel Baluta 2017-04-04 736 best_freq_out = freq_out; 16c42f46 Daniel Baluta 2017-04-04 737 } 6b662dee Daniel Baluta 2017-04-04 738 } 6b662dee Daniel Baluta 2017-04-04 739 } 6b662dee Daniel Baluta 2017-04-04 740 } 6b662dee Daniel Baluta 2017-04-04 741 6b662dee Daniel Baluta 2017-04-04 742 if (*bclk_idx != -1) 6b662dee Daniel Baluta 2017-04-04 @743 wm8960_set_pll(codec, freq_in, best_freq_out); 6b662dee Daniel Baluta 2017-04-04 744 6b662dee Daniel Baluta 2017-04-04 745 return *bclk_idx; 6b662dee Daniel Baluta 2017-04-04 746 } 3176bf2d Zidan Wang 2015-08-11 747 static int wm8960_configure_clocking(struct snd_soc_codec *codec) 0e50b51a Zidan Wang 2015-05-12 748 { 0e50b51a Zidan Wang 2015-05-12 749 struct wm8960_priv *wm8960 = snd_soc_codec_get_drvdata(codec); 6b662dee Daniel Baluta 2017-04-04 750 int freq_out, freq_in; 0e50b51a Zidan Wang 2015-05-12 751 u16 iface1 = snd_soc_read(codec, WM8960_IFACE1); :::::: The code at line 743 was first introduced by commit :::::: 6b662deec0da0ad4f9dce8112d01828ed72b5a4c ASoC: codec: wm9860: Refactor PLL out freq search :::::: TO: Daniel Baluta <daniel.bal...@nxp.com> :::::: CC: 0day robot <fengguang...@intel.com> --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation
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